<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>

<body>
    <div id="app">
        <div v-for="obj in newArr">
            {{obj.name}}----{{obj.color}}
        </div>
    </div>
</body>
<script>
    let vm = {
        data () {
            return {
                arr: [
                    {
                        name: 'GalaxySa',
                        age: 19,
                        color: 'green'
                    },
                    {
                        name: 'SliverTradin',
                        age: 22,
                        color: 'grey'
                    },
                    {
                        name: 'FoggySea',
                        age: 15,
                        color: 'yellow'
                    }
                ],

            }
        },
        computed: {
            newArr () {
                return this.arr.filter(ele => ele.age > 18)
            }
        },
    }
    Vue.createApp(vm).mount('#app')
</script>

</html>